Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
c00c310e | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
1da177e4 LT |
5 | * |
6 | * Created by David Woodhouse <dwmw2@infradead.org> | |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
1da177e4 LT |
10 | */ |
11 | ||
12 | #ifndef __JFFS2_NODELIST_H__ | |
13 | #define __JFFS2_NODELIST_H__ | |
14 | ||
1da177e4 LT |
15 | #include <linux/fs.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/jffs2.h> | |
cbb9a561 DW |
18 | #include "jffs2_fs_sb.h" |
19 | #include "jffs2_fs_i.h" | |
aa98d7cf KK |
20 | #include "xattr.h" |
21 | #include "acl.h" | |
e631ddba | 22 | #include "summary.h" |
1da177e4 LT |
23 | |
24 | #ifdef __ECOS | |
25 | #include "os-ecos.h" | |
26 | #else | |
1da177e4 LT |
27 | #include "os-linux.h" |
28 | #endif | |
29 | ||
1da177e4 LT |
30 | #define JFFS2_NATIVE_ENDIAN |
31 | ||
32 | /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from | |
33 | whatever OS we're actually running on here too. */ | |
34 | ||
35 | #if defined(JFFS2_NATIVE_ENDIAN) | |
36 | #define cpu_to_je16(x) ((jint16_t){x}) | |
37 | #define cpu_to_je32(x) ((jint32_t){x}) | |
38 | #define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)}) | |
39 | ||
566865a2 DW |
40 | #define constant_cpu_to_je16(x) ((jint16_t){x}) |
41 | #define constant_cpu_to_je32(x) ((jint32_t){x}) | |
42 | ||
1da177e4 LT |
43 | #define je16_to_cpu(x) ((x).v16) |
44 | #define je32_to_cpu(x) ((x).v32) | |
45 | #define jemode_to_cpu(x) (jffs2_to_os_mode((x).m)) | |
46 | #elif defined(JFFS2_BIG_ENDIAN) | |
47 | #define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)}) | |
48 | #define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)}) | |
49 | #define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))}) | |
50 | ||
566865a2 DW |
51 | #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)}) |
52 | #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)}) | |
53 | ||
1da177e4 LT |
54 | #define je16_to_cpu(x) (be16_to_cpu(x.v16)) |
55 | #define je32_to_cpu(x) (be32_to_cpu(x.v32)) | |
56 | #define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m))) | |
57 | #elif defined(JFFS2_LITTLE_ENDIAN) | |
58 | #define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)}) | |
59 | #define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)}) | |
60 | #define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))}) | |
61 | ||
566865a2 DW |
62 | #define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)}) |
63 | #define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)}) | |
64 | ||
1da177e4 LT |
65 | #define je16_to_cpu(x) (le16_to_cpu(x.v16)) |
66 | #define je32_to_cpu(x) (le32_to_cpu(x.v32)) | |
67 | #define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m))) | |
182ec4ee | 68 | #else |
1da177e4 LT |
69 | #error wibble |
70 | #endif | |
71 | ||
1e0da3cb AB |
72 | /* The minimal node header size */ |
73 | #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent) | |
74 | ||
1da177e4 LT |
75 | /* |
76 | This is all we need to keep in-core for each raw node during normal | |
77 | operation. As and when we do read_inode on a particular inode, we can | |
182ec4ee | 78 | scan the nodes which are listed for it and build up a proper map of |
1da177e4 LT |
79 | which nodes are currently valid. JFFSv1 always used to keep that whole |
80 | map in core for each inode. | |
81 | */ | |
82 | struct jffs2_raw_node_ref | |
83 | { | |
84 | struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref | |
987d47b7 DW |
85 | for this object. If this _is_ the last, it points to the inode_cache, |
86 | xattr_ref or xattr_datum instead. The common part of those structures | |
87 | has NULL in the first word. See jffs2_raw_ref_to_ic() below */ | |
1da177e4 | 88 | uint32_t flash_offset; |
19e56cea | 89 | #undef TEST_TOTLEN |
ca89a517 | 90 | #ifdef TEST_TOTLEN |
1da177e4 | 91 | uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */ |
ca89a517 | 92 | #endif |
1da177e4 LT |
93 | }; |
94 | ||
9bfeb691 DW |
95 | #define REF_LINK_NODE ((int32_t)-1) |
96 | #define REF_EMPTY_NODE ((int32_t)-2) | |
97 | ||
98 | /* Use blocks of about 256 bytes */ | |
99 | #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1) | |
100 | ||
101 | static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref) | |
102 | { | |
103 | ref++; | |
104 | ||
105 | /* Link to another block of refs */ | |
106 | if (ref->flash_offset == REF_LINK_NODE) { | |
107 | ref = ref->next_in_ino; | |
108 | if (!ref) | |
109 | return ref; | |
110 | } | |
111 | ||
112 | /* End of chain */ | |
113 | if (ref->flash_offset == REF_EMPTY_NODE) | |
114 | return NULL; | |
115 | ||
116 | return ref; | |
117 | } | |
99988f7b | 118 | |
987d47b7 DW |
119 | static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw) |
120 | { | |
99988f7b | 121 | while(raw->next_in_ino) |
987d47b7 | 122 | raw = raw->next_in_ino; |
987d47b7 DW |
123 | |
124 | /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and | |
125 | not actually a jffs2_inode_cache. Check ->class */ | |
126 | return ((struct jffs2_inode_cache *)raw); | |
127 | } | |
128 | ||
ef53cb02 | 129 | /* flash_offset & 3 always has to be zero, because nodes are |
1da177e4 | 130 | always aligned at 4 bytes. So we have a couple of extra bits |
182ec4ee | 131 | to play with, which indicate the node's status; see below: */ |
1da177e4 LT |
132 | #define REF_UNCHECKED 0 /* We haven't yet checked the CRC or built its inode */ |
133 | #define REF_OBSOLETE 1 /* Obsolete, can be completely ignored */ | |
134 | #define REF_PRISTINE 2 /* Completely clean. GC without looking */ | |
135 | #define REF_NORMAL 3 /* Possibly overlapped. Read the page and write again on GC */ | |
136 | #define ref_flags(ref) ((ref)->flash_offset & 3) | |
137 | #define ref_offset(ref) ((ref)->flash_offset & ~3) | |
138 | #define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE) | |
139 | #define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0) | |
6171586a | 140 | |
43dfa07f DW |
141 | /* Dirent nodes should be REF_PRISTINE only if they are not a deletion |
142 | dirent. Deletion dirents should be REF_NORMAL so that GC gets to | |
143 | throw them away when appropriate */ | |
144 | #define dirent_node_state(rd) ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) ) | |
145 | ||
6171586a DW |
146 | /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates |
147 | it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get | |
148 | copied. If you need to do anything different to GC inode-less nodes, then | |
149 | you need to modify gc.c accordingly. */ | |
1da177e4 LT |
150 | |
151 | /* For each inode in the filesystem, we need to keep a record of | |
152 | nlink, because it would be a PITA to scan the whole directory tree | |
153 | at read_inode() time to calculate it, and to keep sufficient information | |
182ec4ee | 154 | in the raw_node_ref (basically both parent and child inode number for |
1da177e4 LT |
155 | dirent nodes) would take more space than this does. We also keep |
156 | a pointer to the first physical node which is part of this inode, too. | |
157 | */ | |
158 | struct jffs2_inode_cache { | |
987d47b7 DW |
159 | /* First part of structure is shared with other objects which |
160 | can terminate the raw node refs' next_in_ino list -- which | |
161 | currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */ | |
162 | ||
1da177e4 LT |
163 | struct jffs2_full_dirent *scan_dents; /* Used during scan to hold |
164 | temporary lists of dirents, and later must be set to | |
165 | NULL to mark the end of the raw_node_ref->next_in_ino | |
166 | chain. */ | |
1da177e4 | 167 | struct jffs2_raw_node_ref *nodes; |
987d47b7 DW |
168 | uint8_t class; /* It's used for identification */ |
169 | ||
170 | /* end of shared structure */ | |
171 | ||
172 | uint8_t flags; | |
173 | uint16_t state; | |
1da177e4 | 174 | uint32_t ino; |
987d47b7 | 175 | struct jffs2_inode_cache *next; |
aa98d7cf | 176 | #ifdef CONFIG_JFFS2_FS_XATTR |
8f2b6f49 | 177 | struct jffs2_xattr_ref *xref; |
aa98d7cf | 178 | #endif |
27c72b04 DW |
179 | uint32_t pino_nlink; /* Directories store parent inode |
180 | here; other inodes store nlink. | |
181 | Zero always means that it's | |
182 | completely unlinked. */ | |
1da177e4 LT |
183 | }; |
184 | ||
185 | /* Inode states for 'state' above. We need the 'GC' state to prevent | |
186 | someone from doing a read_inode() while we're moving a 'REF_PRISTINE' | |
187 | node without going through all the iget() nonsense */ | |
188 | #define INO_STATE_UNCHECKED 0 /* CRC checks not yet done */ | |
189 | #define INO_STATE_CHECKING 1 /* CRC checks in progress */ | |
190 | #define INO_STATE_PRESENT 2 /* In core */ | |
191 | #define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */ | |
192 | #define INO_STATE_GC 4 /* GCing a 'pristine' node */ | |
193 | #define INO_STATE_READING 5 /* In read_inode() */ | |
67e345d1 | 194 | #define INO_STATE_CLEARING 6 /* In clear_inode() */ |
1da177e4 | 195 | |
aa98d7cf | 196 | #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */ |
b723bb7c | 197 | #define INO_FLAGS_IS_DIR 0x02 /* is a directory */ |
aa98d7cf KK |
198 | |
199 | #define RAWNODE_CLASS_INODE_CACHE 0 | |
200 | #define RAWNODE_CLASS_XATTR_DATUM 1 | |
201 | #define RAWNODE_CLASS_XATTR_REF 2 | |
202 | ||
65e5a0e1 DD |
203 | #define INOCACHE_HASHSIZE_MIN 128 |
204 | #define INOCACHE_HASHSIZE_MAX 1024 | |
1da177e4 | 205 | |
9fe4854c DW |
206 | #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size) |
207 | ||
1da177e4 | 208 | /* |
182ec4ee | 209 | Larger representation of a raw node, kept in-core only when the |
1da177e4 LT |
210 | struct inode for this particular ino is instantiated. |
211 | */ | |
212 | ||
213 | struct jffs2_full_dnode | |
214 | { | |
215 | struct jffs2_raw_node_ref *raw; | |
216 | uint32_t ofs; /* The offset to which the data of this node belongs */ | |
217 | uint32_t size; | |
218 | uint32_t frags; /* Number of fragments which currently refer | |
182ec4ee | 219 | to this node. When this reaches zero, |
1da177e4 LT |
220 | the node is obsolete. */ |
221 | }; | |
222 | ||
182ec4ee | 223 | /* |
1da177e4 LT |
224 | Even larger representation of a raw node, kept in-core only while |
225 | we're actually building up the original map of which nodes go where, | |
226 | in read_inode() | |
227 | */ | |
228 | struct jffs2_tmp_dnode_info | |
229 | { | |
9dee7503 | 230 | struct rb_node rb; |
1da177e4 LT |
231 | struct jffs2_full_dnode *fn; |
232 | uint32_t version; | |
1e0da3cb AB |
233 | uint32_t data_crc; |
234 | uint32_t partial_crc; | |
16668c2b | 235 | uint32_t csize; |
df8e96f3 DW |
236 | uint16_t overlapped; |
237 | }; | |
238 | ||
239 | /* Temporary data structure used during readinode. */ | |
240 | struct jffs2_readinode_info | |
241 | { | |
242 | struct rb_root tn_root; | |
243 | struct jffs2_tmp_dnode_info *mdata_tn; | |
244 | uint32_t highest_version; | |
245 | uint32_t latest_mctime; | |
246 | uint32_t mctime_ver; | |
247 | struct jffs2_full_dirent *fds; | |
248 | struct jffs2_raw_node_ref *latest_ref; | |
182ec4ee | 249 | }; |
1da177e4 LT |
250 | |
251 | struct jffs2_full_dirent | |
252 | { | |
b723bb7c DW |
253 | union { |
254 | struct jffs2_raw_node_ref *raw; | |
255 | struct jffs2_inode_cache *ic; /* Just during part of build */ | |
256 | }; | |
1da177e4 LT |
257 | struct jffs2_full_dirent *next; |
258 | uint32_t version; | |
259 | uint32_t ino; /* == zero for unlink */ | |
260 | unsigned int nhash; | |
261 | unsigned char type; | |
262 | unsigned char name[0]; | |
263 | }; | |
264 | ||
265 | /* | |
182ec4ee | 266 | Fragments - used to build a map of which raw node to obtain |
1da177e4 LT |
267 | data from for each part of the ino |
268 | */ | |
269 | struct jffs2_node_frag | |
270 | { | |
271 | struct rb_node rb; | |
272 | struct jffs2_full_dnode *node; /* NULL for holes */ | |
273 | uint32_t size; | |
274 | uint32_t ofs; /* The offset to which this fragment belongs */ | |
275 | }; | |
276 | ||
277 | struct jffs2_eraseblock | |
278 | { | |
279 | struct list_head list; | |
280 | int bad_count; | |
281 | uint32_t offset; /* of this block in the MTD */ | |
282 | ||
283 | uint32_t unchecked_size; | |
284 | uint32_t used_size; | |
285 | uint32_t dirty_size; | |
286 | uint32_t wasted_size; | |
287 | uint32_t free_size; /* Note that sector_size - free_size | |
288 | is the address of the first free space */ | |
9bfeb691 | 289 | uint32_t allocated_refs; |
1da177e4 LT |
290 | struct jffs2_raw_node_ref *first_node; |
291 | struct jffs2_raw_node_ref *last_node; | |
292 | ||
293 | struct jffs2_raw_node_ref *gc_node; /* Next node to be garbage collected */ | |
294 | }; | |
295 | ||
4ce1f562 FH |
296 | static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c) |
297 | { | |
298 | return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024); | |
299 | } | |
300 | ||
ca89a517 | 301 | #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c)) |
1da177e4 | 302 | |
1da177e4 LT |
303 | #define ALLOC_NORMAL 0 /* Normal allocation */ |
304 | #define ALLOC_DELETION 1 /* Deletion node. Best to allow it */ | |
305 | #define ALLOC_GC 2 /* Space requested for GC. Give it or die */ | |
306 | #define ALLOC_NORETRY 3 /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */ | |
307 | ||
308 | /* How much dirty space before it goes on the very_dirty_list */ | |
309 | #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2)) | |
310 | ||
311 | /* check if dirty space is more than 255 Byte */ | |
182ec4ee | 312 | #define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN) |
1da177e4 LT |
313 | |
314 | #define PAD(x) (((x)+3)&~3) | |
315 | ||
aef9ab47 DW |
316 | static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev) |
317 | { | |
318 | if (old_valid_dev(rdev)) { | |
91f80266 AM |
319 | jdev->old_id = cpu_to_je16(old_encode_dev(rdev)); |
320 | return sizeof(jdev->old_id); | |
aef9ab47 | 321 | } else { |
91f80266 AM |
322 | jdev->new_id = cpu_to_je32(new_encode_dev(rdev)); |
323 | return sizeof(jdev->new_id); | |
aef9ab47 DW |
324 | } |
325 | } | |
326 | ||
1da177e4 LT |
327 | static inline struct jffs2_node_frag *frag_first(struct rb_root *root) |
328 | { | |
ea7415cc | 329 | struct rb_node *node = rb_first(root); |
1da177e4 LT |
330 | |
331 | if (!node) | |
332 | return NULL; | |
ea7415cc | 333 | |
1da177e4 LT |
334 | return rb_entry(node, struct jffs2_node_frag, rb); |
335 | } | |
8557fd51 AB |
336 | |
337 | static inline struct jffs2_node_frag *frag_last(struct rb_root *root) | |
338 | { | |
ea7415cc | 339 | struct rb_node *node = rb_last(root); |
8557fd51 AB |
340 | |
341 | if (!node) | |
342 | return NULL; | |
ea7415cc | 343 | |
8557fd51 AB |
344 | return rb_entry(node, struct jffs2_node_frag, rb); |
345 | } | |
346 | ||
1da177e4 LT |
347 | #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb) |
348 | #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb) | |
349 | #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb) | |
350 | #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb) | |
351 | #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb) | |
352 | #define frag_erase(frag, list) rb_erase(&frag->rb, list); | |
353 | ||
df8e96f3 DW |
354 | #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) |
355 | #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) | |
356 | #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) | |
357 | #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb) | |
358 | #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb) | |
359 | #define tn_erase(tn, list) rb_erase(&tn->rb, list); | |
360 | #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb) | |
361 | #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb) | |
362 | ||
1da177e4 | 363 | /* nodelist.c */ |
1da177e4 | 364 | void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list); |
1da177e4 LT |
365 | void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state); |
366 | struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino); | |
367 | void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new); | |
368 | void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old); | |
369 | void jffs2_free_ino_caches(struct jffs2_sb_info *c); | |
370 | void jffs2_free_raw_node_refs(struct jffs2_sb_info *c); | |
371 | struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset); | |
372 | void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete); | |
f97117d1 | 373 | int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn); |
61c4b237 | 374 | uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size); |
2f785402 DW |
375 | struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c, |
376 | struct jffs2_eraseblock *jeb, | |
377 | uint32_t ofs, uint32_t len, | |
378 | struct jffs2_inode_cache *ic); | |
ca89a517 DW |
379 | extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c, |
380 | struct jffs2_eraseblock *jeb, | |
381 | struct jffs2_raw_node_ref *ref); | |
1da177e4 LT |
382 | |
383 | /* nodemgmt.c */ | |
384 | int jffs2_thread_should_wake(struct jffs2_sb_info *c); | |
9fe4854c | 385 | int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, |
e631ddba | 386 | uint32_t *len, int prio, uint32_t sumsize); |
9fe4854c | 387 | int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, |
e631ddba | 388 | uint32_t *len, uint32_t sumsize); |
2f785402 DW |
389 | struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c, |
390 | uint32_t ofs, uint32_t len, | |
391 | struct jffs2_inode_cache *ic); | |
1da177e4 LT |
392 | void jffs2_complete_reservation(struct jffs2_sb_info *c); |
393 | void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw); | |
1da177e4 LT |
394 | |
395 | /* write.c */ | |
396 | int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri); | |
397 | ||
9fe4854c DW |
398 | struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
399 | struct jffs2_raw_inode *ri, const unsigned char *data, | |
400 | uint32_t datalen, int alloc_mode); | |
401 | struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
402 | struct jffs2_raw_dirent *rd, const unsigned char *name, | |
403 | uint32_t namelen, int alloc_mode); | |
1da177e4 | 404 | int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
182ec4ee | 405 | struct jffs2_raw_inode *ri, unsigned char *buf, |
1da177e4 | 406 | uint32_t offset, uint32_t writelen, uint32_t *retlen); |
9fe4854c | 407 | int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, |
2a7dba39 | 408 | struct jffs2_raw_inode *ri, const struct qstr *qstr); |
9fe4854c DW |
409 | int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, |
410 | int namelen, struct jffs2_inode_info *dead_f, uint32_t time); | |
411 | int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, | |
412 | uint8_t type, const char *name, int namelen, uint32_t time); | |
1da177e4 LT |
413 | |
414 | ||
415 | /* readinode.c */ | |
182ec4ee | 416 | int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
1da177e4 LT |
417 | uint32_t ino, struct jffs2_raw_inode *latest_node); |
418 | int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); | |
419 | void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); | |
420 | ||
421 | /* malloc.c */ | |
422 | int jffs2_create_slab_caches(void); | |
423 | void jffs2_destroy_slab_caches(void); | |
424 | ||
425 | struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize); | |
426 | void jffs2_free_full_dirent(struct jffs2_full_dirent *); | |
427 | struct jffs2_full_dnode *jffs2_alloc_full_dnode(void); | |
428 | void jffs2_free_full_dnode(struct jffs2_full_dnode *); | |
429 | struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void); | |
430 | void jffs2_free_raw_dirent(struct jffs2_raw_dirent *); | |
431 | struct jffs2_raw_inode *jffs2_alloc_raw_inode(void); | |
432 | void jffs2_free_raw_inode(struct jffs2_raw_inode *); | |
433 | struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void); | |
434 | void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *); | |
9bfeb691 | 435 | int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, |
046b8b98 | 436 | struct jffs2_eraseblock *jeb, int nr); |
9bfeb691 | 437 | void jffs2_free_refblock(struct jffs2_raw_node_ref *); |
1da177e4 LT |
438 | struct jffs2_node_frag *jffs2_alloc_node_frag(void); |
439 | void jffs2_free_node_frag(struct jffs2_node_frag *); | |
440 | struct jffs2_inode_cache *jffs2_alloc_inode_cache(void); | |
441 | void jffs2_free_inode_cache(struct jffs2_inode_cache *); | |
aa98d7cf KK |
442 | #ifdef CONFIG_JFFS2_FS_XATTR |
443 | struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void); | |
444 | void jffs2_free_xattr_datum(struct jffs2_xattr_datum *); | |
445 | struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void); | |
446 | void jffs2_free_xattr_ref(struct jffs2_xattr_ref *); | |
447 | #endif | |
1da177e4 LT |
448 | |
449 | /* gc.c */ | |
450 | int jffs2_garbage_collect_pass(struct jffs2_sb_info *c); | |
451 | ||
452 | /* read.c */ | |
453 | int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
454 | struct jffs2_full_dnode *fd, unsigned char *buf, | |
455 | int ofs, int len); | |
456 | int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
457 | unsigned char *buf, uint32_t offset, uint32_t len); | |
458 | char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f); | |
459 | ||
460 | /* scan.c */ | |
461 | int jffs2_scan_medium(struct jffs2_sb_info *c); | |
462 | void jffs2_rotate_lists(struct jffs2_sb_info *c); | |
e631ddba FH |
463 | struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino); |
464 | int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); | |
68270995 | 465 | int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size); |
1da177e4 LT |
466 | |
467 | /* build.c */ | |
468 | int jffs2_do_mount_fs(struct jffs2_sb_info *c); | |
469 | ||
470 | /* erase.c */ | |
9957abea | 471 | int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count); |
c38c1b61 | 472 | void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
1da177e4 | 473 | |
2f82ce1e | 474 | #ifdef CONFIG_JFFS2_FS_WRITEBUFFER |
1da177e4 LT |
475 | /* wbuf.c */ |
476 | int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); | |
477 | int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); | |
478 | int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); | |
479 | int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); | |
480 | #endif | |
481 | ||
730554d9 AB |
482 | #include "debug.h" |
483 | ||
1da177e4 | 484 | #endif /* __JFFS2_NODELIST_H__ */ |